Estado Puro in Madrid is run by Chef Paco Roncero, who worked for Chef Ferran Adria at El Bulli. Fantastic tapas here. I was pleasantly suprised how it was a cocktail hour - meaning, it was not a sit down dinner, but rather we walked around and talked for the duration of the dinner. It was nuts. We had an open bar and to say that the experience is fantastic is an understatement.
EDIT: They only accept ten pictures at a time, apparently.